(1) The drainage mud pump is used to discharge the sewage in the well to the bottom of the well. The pipeline to be dredged is segmented, and the segmentation method is allocated according to the diameter and length of the pipeline. The same pipe diameter is the part between the two inspection wells.

（2）稀释污泥高压水车，将两个检查井注入井室，用挖泥船搅拌检查井和污水管道中的污泥稀释污泥；手动配合机器连续搅拌污泥，直到污泥稀释到水中。

(2) Dilute the sludge with a high-pressure water truck, inject two inspection wells into the well chamber, and mix the sludge in the inspection well and sewage pipeline with a dredger to dilute the sludge; Manually cooperate with the machine to continuously stir the sludge until the sludge is diluted into water.

（3）污水吸粪车将吸入两口检查井中的淤泥。两个检查井中剩余的少量污泥将在井室中用高压水枪撞击井底，然后再次稀释，然后完成抽水。 （4）拦截设置堵塞块将阻塞井进口管入口块从工作段顶部，然后堵塞下游检查井出口和其他管道口，只留下管道段的入口和出口。

(3) The sewage suction truck will suck the sludge in the two inspection wells. A small amount of sludge remaining in the two inspection wells will hit the bottom of the well with a high-pressure water gun in the well chamber, then dilute again, and then complete pumping（ 4) The blocking block is set to block the inlet block of the inlet pipe of the blocking well from the top of the first working section, and then block the outlet of the downstream inspection well and other pipe ports, leaving only the inlet and outlet of the pipe section.

（5）高压清洗车疏浚采用高压清洗车进行管道疏通，高压清洗车水管延伸到上游检查井下部，出水口直达管道流向喷水，污水管道下游检查井继续。吸入室内污泥。

(5) The high-pressure cleaning vehicle is used for dredging the pipeline. The water pipe of the high-pressure cleaning vehicle extends to the lower part of the upstream inspection well, the water outlet flows directly to the pipeline to spray water, and the inspection well at the downstream of the sewage pipeline continues. Inhale indoor sludge.

（6）进入检查井前，通风施工人员必须使大气中的氧气进入检查井或使用鼓风机进行通风换气，测量井内的氧气含量，施工人员必须系好安全带，防毒面具和氧气进入井中罐。

(6) Before entering the inspection well, the ventilation construction personnel must make the oxygen in the atmosphere enter the inspection well or use the blower for ventilation, measure the oxygen content in the well, and the construction personnel must fasten the safety belt, gas mask and oxygen into the well tank.

（7）疏浚完成后，施工人员在地下井施工前安排施工人员的安全措施，手工清理检查井中剩余的砖块，石块，部分污泥和其他残留物，直至清理完毕。完成了。然后，根据以上描述，下游污水检查井逐一疏浚，上游首先清理的检查井在施工疏浚过程中被堵塞，以防止上游污泥流入管道或流入管道上游充满了水。检查井和管道。排水和排污管道排水工人应当采用设备辅助和人工操作的方式对道路上的排污管道进行淤泥开挖。

(7) After the completion of dredging, the construction personnel shall arrange the safety measures for the construction personnel before the construction of the underground well, and manually clean the remaining bricks, stones, some sludge and other residues in the inspection well until the cleaning is completed. It's done. Then, according to the above description, the downstream sewage inspection wells are dredged one by one, and the inspection wells first cleaned in the upstream are blocked during construction dredging, so as to prevent the upstream sludge from flowing into the pipeline or the upstream of the pipeline is filled with water. Inspection wells and pipes. Drainage workers of drainage and sewage pipes shall excavate the sludge of sewage pipes on the road by means of equipment assistance and manual operation.

（8）明确使用挖掘机堆积和干燥排水污水管和污水管中清除的污泥，将污泥运走。

(8) The excavator shall be used to stack and dry the sludge removed from the drainage sewage pipe and sewage pipe, and finally the sludge shall be transported away.